While a well-formed document is well-formed because it follows rules defined by the XML spec, a valid document is valid because it matches its document type definition (DTD). The DTD is the grammar ...

Nearly everyone is talking about XML (Extensible Markup Language) these days. But few understand what it's really all about. XML's proponents claim it will cure everything that's wrong with HTML and ...

If hearing "XML this" and "XML that" has your head spinning, this basic tutorial will help. Get up to speed on when, why, and how to use XML. If you’ve been stuck on some legacy project, the gap ...